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common : implement common_schema internal representation for JSON schemas (#28736)

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* common : implement common_schema types

* common : implement a json schema optimizer

* common : reduce optimizations

* common : refactor json-schema-to-grammar to use common_schema

* common : use common_trie

* common/schema : implement type/kind resolution

* cont : cleanup

* cont : remove common_chat_tool_parameters

* cont : simplify schema resolution

* cont : pass common_schema through the json-schema-to-grammar builder

* cont : cleanup

* cont : move enums under common_schema and add type enum

* cont : reduce test cases

* cont : clean up

* cont : clean up

* refactor : rename common_schema_parse to common_schema_from_json

* tests : fix gcc dangling-reference warning in test-json-schema

* tests : take the schema label as const char * to satisfy gcc dangling-reference

* refactor : rename common_schema_builder parse_* methods to build_*

* cont : fix may_be_string

* cont : properly handle empty tool parameters

* cont : add tests for empty $ref

* cont : remove dead code

* cont : update docs

* cont : make "{}" mean any object for json_object as well

* cont : restore (min|max)Length to imply string type

* cont : rename common_schema to common_chat_schema
This commit is contained in:
Aldehir Rojas
2026-09-12 16:14:50 -05:00
committed by GitHub
parent ae9afff8d2
commit acecd56032
45 changed files with 1738 additions and 1933 deletions
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common/arg.cpp
+2 -2
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@@ -2277,14 +2277,14 @@ common_params_context common_params_parser_init(common_params & params, llama_ex
).set_sampling());
add_opt(common_arg(
{"-j", "--json-schema"}, "SCHEMA",
"JSON schema to constrain generations (https://json-schema.org/), e.g. `{}` for any JSON object\nFor schemas w/ external $refs, use --grammar + example/json_schema_to_grammar.py instead",
"JSON schema to constrain generations (https://json-schema.org/), e.g. `{\"type\": \"object\"}` for any JSON object",
[](common_params & params, const std::string & value) {
params.sampling.grammar = {COMMON_GRAMMAR_TYPE_OUTPUT_FORMAT, json_schema_to_grammar(json::parse(value))};
}
).set_sampling());
add_opt(common_arg(
{"-jf", "--json-schema-file"}, "FILE",
"File containing a JSON schema to constrain generations (https://json-schema.org/), e.g. `{}` for any JSON object\nFor schemas w/ external $refs, use --grammar + example/json_schema_to_grammar.py instead",
"File containing a JSON schema to constrain generations (https://json-schema.org/), e.g. `{\"type\": \"object\"}` for any JSON object",
[](common_params & params, const std::string & value) {
std::ifstream file(value);
if (!file) {